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2 Stroke engines are noisy and I believe may be on the way out - apart from all the old ones - you don't see many 2 stroke outboard engines these days. You should not run one of these units in an enclosed space because the exhaust fumes will kill you :D. My Honda 2.2 kVA suitcase...

Well with pitch supplies you will probably want to use a TT system anyway. Winter loads are likely to be higher than summer so you may take some advantage of a generally lower ambient temperature in winter. Are these holiday caravans ? You may want to consider several runs of smaller...

Leaving aside the conductor operating temperature connection for now - I would ask that you look at the following. When I run this design through a rather antiquated copy of Amtech Single Cable I get a cable size of 70mm² - not the 16mm² you appear to be applying in your equation. This is...

Given the low ceiling height I would be inclined to look at wall washers and up lighters - it would depend on colour schemes. Would more specific task lighting (spot lights etc) help.

All of the bodies say that but there is no way you can ensure that only qualified operatives will be used. The only effective answer would be to restrict access to the trade and license all operatives. This would not prevent 'unauthorised' trading but it would allow a basis for it to...

CORGI registered companies and then had requirements for staff training - CORGI was actually modeled on the NICEIC but with some changes. The first thing the Government said when the NICEIC finally joined the discussions was - we don't want another CORGI. They also didn't want to follow...

There is nothing despicable about it. The NICEIC have operate such a scheme for years, it simply reflects the employment structure and economics of the industry. The only way registering all works is if all companies only employ very small numbers of personnel. If the government of the day...

NAPIT started life just registering 'electrical inspectors'. Initially they did not complete directly with the NICEIC, i.e. they did not register contractors, they registered individual inspectors. John Andrews originally formed NAPIT because he could not persuade the NICEIC to register...

Read Clause 10 http://www.napit.org.uk/objectives.asp Any scheme has to accept that registering all operatives in a multi employee company is not economically viable. If you search the site further you will find this - http://www.napit.org.uk/pdf/CP_Booklet_lores.pdf Note how most...

Yes at about £100 a pop, and they might be uncontrollerable when fully extended (5 metres) :D. I make my own out of old fibre glass fishing rods (best not to use carbon fibre or graphite :D).

If this test is only carried out once in the sequence list in BS 7671 it does not confirm polarity. In fact no test can actually confirm polarity - because testing cannot reveal all faults. GN3 says "For radial circuits the (R1 + R2) measurements, made as in test method 1 (Section 2.7.5)...

The first edition (or perhaps I should say, one version of it) is reproduced in the "Commentary on IEE Wiring Regulations" by Paul Cook. I manage to reproduce it on one side of A4 for a lecture I gave to the IEE in Manchester many moons ago - mind you my eye sight was better then :D. I...

Are there any capacitors in the motor connected between line(s) and earth? These could be forming a low pass filter.

Not if you pass it through high and low pass filters first :D. Mind you its probably cheaper to buy a 'proper' sinewave inverter in the first place. http://www.thepowerstore.co.uk/sinewaveinvertersvolts.asp?Volt=12 :wink:

:D The Electrical Safety Council support the use of 3 mm plate, as you have suggested - provided the use of shot fired nails is unlikely :D. See here - look for NDQ12/NDA12 http://www.esc.org.uk/forum/forum_nd_thread.html

Its not an extraneous-conductive-part because it is not liable to introduce a potential. Nor is it an exposed-conductive-part as it is not part of any equipment. However, the interesting question is would it be strong enough to prevent penetration by nails screws and the like :shock...

We are not expecting it to - we were just looking at fault current protection, not overload. The OP has indicated that it is actually protected by a 50A mcb but no details are given.

George765 Well I expect that you thought that you were asking a simple question – can I use 16mm2 PVCTWE for a 50A distribution circuit to my garage – but :D 1) You have not given sufficient information; 2) I expect that you now know that the problem is far more complex than you ever...

What fun we are having with this :D. Just a few points to note: 1) The adiabatic equation is only valid over the time range 0.1 to 5 seconds – why – because below 0.1 seconds the current wave may be asymmetric and this cannot be represent by I2t as the (I) in that formula is the rms value...

Note: I have edited my original post as I found more info on Irish rings :D. I have a copy of the Irish regulations - valid in 1991. These do permit BS 1363 socket outlets (I.S 411) and they do permit ring mains [583]. They use the 0.67 factor for cable rating as we did. They also have...